c: ta có: \(7x^2-2x-5=0\)
\(\Leftrightarrow\left(x-1\right)\left(7x+5\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=1\\x=-\dfrac{5}{7}\end{matrix}\right.\)
tim x
giup mik voi
5x^3-7x^2-15x+21=0
(x-3)^2=4x^20x+25
7x2-2x-5=0
Giúp mk vs 👍👍
Tìm x,biết:
a, x.(x-5)- 4x+20=0
b, x(x+6)-7x-42=0
c, x^3-5x^2+x-5=0
d, x^4-2x^3+10x^2-20x=0
tìm x:
x^3-16x=0
x^4-2x^3+10x^2-20x=0
(2x-3)^2=(x+5)^2
x^2(x-1)-4x^2+8x-4=0
1.Tìm x:
a,x mũ 3 - 16 = 0
b,x mũ 4 - 2x mũ 3 + 10x mũ 2 - 20x = 0
c,(2x - 3)mũ 2 = (x + 5)mũ 2
d,x mũ 2(x - 1) - 4x mũ 2 + 8x -4 = 0
e,x mũ 3 - 11x mũ 2 + 30x = 0
P/s:Giúp mk vs chiều mk phải nộp rồi
1.Tìm x:
a,x mũ 3 - 16 = 0
b,x mũ 4 - 2x mũ 3 + 10x mũ 2 - 20x = 0
c,(2x - 3)mũ 2 = (x + 5)mũ 2
d,x mũ 2(x - 1) - 4x mũ 2 + 8x -4 = 0
e,x mũ 3 - 11x mũ 2 + 30x = 0
P/s:Giúp mk vs chiều mai mk phải nộp rồi
Tìm x ( tách hạng tử )
a,x3 + 2x2 - 3 = 0 e,4x2 + 4x - 3 = 0
b,x3 - 7x - 6 = 0 f,4x4 + 4x2y2 - 8y4 = 0
c,x3 + x2 + 4 = 0 g,x3 - 2x2 - x + 2 = 0
d,x2 - x - 12 = 0
Mọi người giúp mk vs ak!
Tìm x
a) 6x2 - 15x + (2x - 5)(2x + 5) = 0
b) 2x3 + 3x2 + 2x + 3 = 0
Phân tích đa thức
A, X2+9y2-y4-6xy b, 2x2-x-28
Rút gọn
a, 2x(x2-2x+3)-2x3 b, 2x(x-3)-(x+5)(2x-1) c, (5-x)2+(x+5)2-(2x+10)(x-5)
Tìm x
a, x-2=(x-2)2 =0 b, (-3x+9)x2-7x +21=0
2) 3x^2 + 3x - 6 ; 4) 6x^2 - 13x + 6 ;
5) 6x^2 + 13x + 6 ; 6) 6x^2 + 15x + 6 ;
7) 6x^2 - 15x + 6 ; 8) 6x^2 + 20x + 6 ;
9) 6x^2 - 20x + 6 ; 10) 6x^2 + 12x + 6 ;
11) 8x^2 - 2x - 3 ; 12) 8x^2 + 2x - 3 ;
13) -8x^2 + 5x + 3 ; 14) 8x^2 - 10x - 3 ;
15) 8x^2 + 10x - 3 ; 16) -8x^2 + 23x + 3 ;
17) 8x^2 - 23x - 3 ; 18) 10x^2 - 11x - 6 ;
19) -10x^2 + 11x + 6 ; 20) 10x^2 - 4x - 6 ;
HELP ME!!!
